Remove unnecessary layer (#488)

Duplicated layer
2022-03-19 07:36:08 +01:00 · 2022-03-19 07:36:08 +01:00 · 4a011ff0e9
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@ -10,7 +10,6 @@ RUN apk add --no-cache python3
 RUN python3 -m ensurepip
 RUN pip3 install --upgrade pip
 RUN pip3 install requests
-RUN pip3 install requests
 RUN pip3 install applicationinsights
 COPY ./engine /RESTler/engine
 RUN python3 -m compileall -b /RESTler/engine