remove mt step for running test

Author: yowl

eng/pipelines/runtimelab/runtimelab-post-build-steps.yml

@@ -50,9 +50,6 @@ steps:
           displayName: Build runtime tests
 
     - ${{ if contains(parameters.platform, 'win') }}:
-    - ${{ elseif in(parameters.platform, 'browser_multithread_wasm_win', 'wasi_multithread_wasm_win') }}:
-      - script: $(Build.SourcesDirectory)/src/tests/run$(scriptExt) runnativeaottests $(buildConfigUpper) ${{ parameters.archType }} ${{ parameters.osGroup }}
-        displayName: Run WebAssembly multithread tests in single file mode
       - script: $(Build.SourcesDirectory)/src/tests/run$(scriptExt) runnativeaottests $(buildConfigUpper) ${{ parameters.archType }} ${{ parameters.osGroup }}
         displayName: Run runtime tests
     - ${{ else }}:
@@ -72,3 +69,4 @@ steps:
     - template: /eng/pipelines/common/upload-intermediate-artifacts-step.yml
       parameters:
         name: ${{ parameters.platform }}${{ parameters.nameSuffix }}
+