remove unnecessary install of torchtitan

.github/workflows/integration_test_periodic.yaml

@@ -36,7 +36,6 @@ jobs:
           pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu121
           python -m pip install -r requirements.txt
           python -m pip install -r dev-requirements.txt
-          python -m pip install -e .
       - name: Run test_runner.py
         run: python ./test_runner.py
       - name: Upload Coverage to Codecov

.github/workflows/unit_test_4gpu.yaml

@@ -36,7 +36,6 @@ jobs:
           pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu121
           python -m pip install -r requirements.txt
           python -m pip install -r dev-requirements.txt
-          python -m pip install -e .
       - name: Run test_runner.py
         run: python ./test_runner.py
       - name: Upload Coverage to Codecov

.github/workflows/unit_test_cpu.yaml

@@ -36,7 +36,6 @@ jobs:
           pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu121
           python -m pip install -r requirements.txt
           python -m pip install -r dev-requirements.txt
-          python -m pip install -e .
       - name: Run unit tests with coverage
         run: pytest test --cov=. --cov-report=xml --durations=20 -vv
       - name: Upload Coverage to Codecov

README.md

@@ -52,7 +52,6 @@ git clone https://github.com/pytorch/torchtitan
 cd torchtitan
 pip install -r requirements.txt
 pip3 install --pre torch --index-url https://download.pytorch.org/whl/nightly/cu121 # or cu118
-pip install .
 ```
 
 ### Downloading a tokenizer