Remove all references to sevenbridges tags

RabixComposer, which uses the `sevenbridges` namespace and `sbg` tags, cannot
handle CWL version 1.2 files. Removed all references to the namespace and tags.

lofar-cwl/steps/Ateamclipper.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: check_ateam_separation
 baseCommand:
   - Ateamclipper.py

lofar-cwl/steps/DP3.DemixerStepGenerator.cwl

@@ -2,8 +2,6 @@
 
 class: Workflow
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: demix_step_generator
 
 inputs:

lofar-cwl/steps/DP3.Execute.cwl

@@ -2,57 +2,37 @@ class: Workflow
 cwlVersion: v1.2
 id: dp3_execute
 label: DP3.Execute
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 inputs:
   - id: msout_name
     type: string
-    'sbg:x': -425.39886474609375
-    'sbg:y': 127
   - id: msin
     type: Directory
-    'sbg:x': -254.39886474609375
-    'sbg:y': 242
   - id: steps
     type: 'Any[]?'
-    'sbg:x': -518.3988647460938
-    'sbg:y': -88
   - id: autoweight
     type: boolean
     default: true
-    'sbg:x': -113
-    'sbg:y': 290
 outputs:
   - id: secondary_output_files
     outputSource:
       - dppp/secondary_output_files
     type: Any
-    'sbg:x': 213.60113525390625
-    'sbg:y': -184
   - id: secondary_output_directories
     outputSource:
       - dppp/secondary_output_directories
     type: Any
-    'sbg:x': 248.60113525390625
-    'sbg:y': -47
   - id: msout
     outputSource:
       - dppp/msout
     type: Directory
-    'sbg:x': 224.60113525390625
-    'sbg:y': 130
   - id: logfile
     outputSource:
       - dppp/logfile
     type: 'File[]'
-    'sbg:x': 185.1875
-    'sbg:y': 334.5
   - id: parset
     outputSource:
       - generic_step/parset
     type: File
-    'sbg:x': 11.1875
-    'sbg:y': -299.5
 steps:
   - id: generic_step
     in:
@@ -66,8 +46,6 @@ steps:
       - id: output_file_names
       - id: output_directory_names
     run: ./DP3.ParsetGenerator.cwl
-    'sbg:x': -294
-    'sbg:y': -84
   - id: dppp
     in:
       - id: parset
@@ -94,6 +72,4 @@ steps:
       - id: secondary_output_directories
       - id: logfile
     run: ./DPPP.cwl
-    'sbg:x': 26
-    'sbg:y': -46
 requirements: []

lofar-cwl/steps/DP3.FilterStepGenerator.cwl

@@ -2,8 +2,6 @@
 
 class: Workflow
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: dp3-filter-step-generator
 
 inputs:

lofar-cwl/steps/DPPP.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: dppp
 baseCommand:
   - DP3

lofar-cwl/steps/H5ParmCollector.cwl

 class: CommandLineTool
 cwlVersion: v1.2
 $namespaces:
-  sbg: 'https://www.sevenbridges.com/'
   lofar: https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl
 $schema:
   - https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl

lofar-cwl/steps/LoSoTo.PrefactorBandpass.cwl

@@ -2,7 +2,6 @@ class: CommandLineTool
 cwlVersion: v1.2
 $namespaces:
   lofar: 'https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl'
-  sbg: 'https://www.sevenbridges.com/'
 id: losoto_prefactor_bandpass
 baseCommand:
   - losoto

lofar-cwl/steps/LoSoTo.PrefactorXYoffset.cwl

@@ -2,7 +2,6 @@ class: CommandLineTool
 cwlVersion: v1.2
 $namespaces:
   lofar: 'https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl'
-  sbg: 'https://www.sevenbridges.com/'
 id: losoto_prefactor_xyoffset
 baseCommand:
   - losoto

lofar-cwl/steps/applybeam.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: applybeam
 baseCommand:
   - DP3

lofar-cwl/steps/applycal.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: applycal
 baseCommand:
   - DP3

lofar-cwl/steps/applytarget.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: applytarget
 baseCommand:
   - DP3

lofar-cwl/steps/average.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: average
 baseCommand:
   - DP3

lofar-cwl/steps/calib_rot_diag.cwl

@@ -2,7 +2,6 @@ class: CommandLineTool
 cwlVersion: v1.2
 $namespaces:
   lofar: 'https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl'
-  sbg: 'https://www.sevenbridges.com/'
 id: calib_rot_diag
 baseCommand:
   - DP3

lofar-cwl/steps/dpppconcat.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: dpppconcat
 baseCommand:
   - DP3

lofar-cwl/steps/filter_predict.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: predict
 baseCommand:
   - DP3

lofar-cwl/steps/gaincal.cwl

@@ -2,7 +2,6 @@ class: CommandLineTool
 cwlVersion: v1.2
 $namespaces:
   lofar: 'https://git.astron.nl/eosc/ontologies/raw/master/schema/lofar.owl'
-  sbg: 'https://www.sevenbridges.com/'
 id: gaincal
 baseCommand:
   - DP3

lofar-cwl/steps/interpolate_visibilities.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: interpolate_visibilities
 baseCommand:
   - DP3

lofar-cwl/steps/makesourcedb.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: make_sourcedb
 baseCommand:
   - makesourcedb

lofar-cwl/steps/ms_concat.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: ms_concat
 baseCommand:
   - /bin/bash

lofar-cwl/steps/predict.cwl

 class: CommandLineTool
 cwlVersion: v1.2
-$namespaces:
-  sbg: 'https://www.sevenbridges.com/'
 id: predict
 baseCommand:
   - DP3