Remove unused variables in pytests from azure (#14618)

.ci/azure/linux.yml

@@ -275,8 +275,6 @@ jobs:
 
     # Skip test_onnx/test_zoo_models and test_onnx/test_backend due to long execution time
   - script: |
-      export DATA_PATH=$(MODELS_PATH)
-      export MODELS_PATH=$(MODELS_PATH)
       # because of static build libgna is needed for python binary
       export LD_LIBRARY_PATH=$(REPO_DIR)/temp/gna_03.00.00.1910/linux/x64:$LD_LIBRARY_PATH
       python3 -m pytest -s $(INSTALL_TEST_DIR)/pyngraph $(PYTHON_STATIC_ARGS) \
@@ -288,8 +286,6 @@ jobs:
 
     # Skip test_onnx/test_zoo_models and test_onnx/test_backend due to long execution time
   - script: |
-      export DATA_PATH=$(MODELS_PATH)
-      export MODELS_PATH=$(MODELS_PATH)
       # because of static build libgna is needed for python binary and mock_py frontend library
       export LD_LIBRARY_PATH=$(REPO_DIR)/temp/gna_03.00.00.1910/linux/x64:$(INSTALL_TEST_DIR):$LD_LIBRARY_PATH
       # For python imports to import pybind_mock_frontend

.ci/azure/linux_debian.yml

@@ -235,8 +235,6 @@ jobs:
 
     # Skip test_onnx/test_zoo_models and test_onnx/test_backend due to long execution time
   - script: |
-      export DATA_PATH=$(MODELS_PATH)
-      export MODELS_PATH=$(MODELS_PATH)
       python3 -m pytest -s $(INSTALL_TEST_DIR)/pyngraph \
         --junitxml=$(INSTALL_TEST_DIR)/TEST-Pyngraph.xml \
         --ignore=$(INSTALL_TEST_DIR)/pyngraph/tests/test_onnx/test_zoo_models.py \
@@ -246,8 +244,6 @@ jobs:
 
     # Skip test_onnx/test_zoo_models and test_onnx/test_backend due to long execution time
   - script: |
-      export DATA_PATH=$(MODELS_PATH)
-      export MODELS_PATH=$(MODELS_PATH)
       # Required by python imports to load requires libraries
       # - tests install dir for mock_py
       # - OpenVINO wheel installation dir for others frontend required by mock_py (is not part of wheel pkg)