Clean up some mobile package related files and their usages. (#21606)

The mobile packages have been removed.

Author: edgchen1

cmake/onnxruntime_python.cmake

@@ -508,7 +508,6 @@ file(GLOB onnxruntime_ort_format_model_srcs CONFIGURE_DEPENDS
 )
 file(GLOB onnxruntime_mobile_helpers_srcs CONFIGURE_DEPENDS
     ${REPO_ROOT}/tools/python/util/mobile_helpers/*.py
-    ${REPO_ROOT}/tools/ci_build/github/android/mobile_package.required_operators.config
     ${REPO_ROOT}/tools/ci_build/github/android/nnapi_supported_ops.md
     ${REPO_ROOT}/tools/ci_build/github/apple/coreml_supported_mlprogram_ops.md
     ${REPO_ROOT}/tools/ci_build/github/apple/coreml_supported_neuralnetwork_ops.md

docs/ORTMobilePackageOperatorTypeSupport.md

@@ -13,21 +13,9 @@ resources:
     ref: 5eda9aded5462201e6310105728d33016e637ea7
 
 stages:
-
-# checks enabled in all builds
-
 - template: templates/android-binary-size-check-stage.yml
   parameters:
     Name: MinimalBaseline
     BuildConfigFile: "tools/ci_build/github/linux/ort_minimal/build_check_binsize_config/android_minimal_baseline.config"
     BinarySizeThresholdInBytes: 1306224
     DoBuildWithDebugInfo: ${{ parameters.DoBuildWithDebugInfo }}
-
-# checks excluded from PR builds
-
-- ${{ if ne(variables['Build.Reason'], 'PullRequest') }}:
-  - template: templates/android-binary-size-check-stage.yml
-    parameters:
-      Name: MinimalWithMobilePackageOps
-      BuildConfigFile: "tools/ci_build/github/linux/ort_minimal/build_check_binsize_config/android_minimal_with_mobile_package_ops.config"
-      DoBuildWithDebugInfo: ${{ parameters.DoBuildWithDebugInfo }}