Remove extra install keyword (#5086)

Dockerfile

@@ -35,7 +35,7 @@ RUN apt-get update && \
 # Install Python Dependencies
 
 COPY dev-requirements.txt .
-RUN pip install --user -U pip --no-cache-dir install -r dev-requirements.txt
+RUN pip install --user -U pip --no-cache-dir -r dev-requirements.txt
 
 # Activate a Python venv
 RUN python3 -m venv /opt/fides
@@ -45,12 +45,12 @@ ENV PATH="/opt/fides/bin:${PATH}"
 RUN pip --no-cache-dir --disable-pip-version-check install --upgrade pip setuptools wheel
 
 COPY requirements.txt .
-RUN pip install --no-cache-dir install -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
 COPY optional-requirements.txt .
-RUN pip install --no-cache-dir install -r optional-requirements.txt
+RUN pip install --no-cache-dir -r optional-requirements.txt
 
 COPY dev-requirements.txt .
-RUN pip install --no-cache-dir install -r dev-requirements.txt
+RUN pip install --no-cache-dir -r dev-requirements.txt
 
 ##################
 ## Backend Base ##