[TS] Remove duplicated build-ts ci (#6575)

Now we already have a real build-ts ci job, let's remove the commented
one.

.github/workflows/build.yml

@@ -164,18 +164,6 @@ jobs:
   #    working-directory: tests
   #    run: bash JavaScriptTest.sh
 
-  #build-ts:
-  #  name: Build TS
-  #  runs-on: ubuntu-latest
-  #  steps:
-  #  - uses: actions/checkout@v1
-  #  - name: flatc
-  #    # FIXME: make test script not rely on flatc
-  #    run: cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DFLATBUFFERS_BUILD_TESTS=OFF -DFLATBUFFERS_INSTALL=OFF -DFLATBUFFERS_BUILD_FLATLIB=OFF -DFLATBUFFERS_BUILD_FLATHASH=OFF . && make -j4
-  #  - name: test
-  #    working-directory: tests
-  #    run: bash TypeScriptTest.sh
-
   build-python:
     name: Build Python
     runs-on: ubuntu-latest