fix build

tools/images/cromite-build/Dockerfile

@@ -12,7 +12,6 @@ USER lg
 WORKDIR /home/lg/working_dir
 
 COPY pre-start.sh .
-COPY start-build.sh .
 COPY goma_auth.py .
 COPY casupload .
 
@@ -21,9 +20,7 @@ COPY generic_android31.textpb .
 ENV CIPD_CACHE_DIR=/home/lg/working_dir/.cipd_cache
 ENV VPYTHON_VIRTUALENV_ROOT=/home/lg/vpython_root
 
-RUN sudo chmod +x ./start-build.sh \
-    && \
-    sudo chmod +x ./pre-start.sh \
+RUN sudo chmod +x ./pre-start.sh \
     && \
     sudo chmod 775 ./goma_auth.py \
     && \