IJPL-190188 a custom Dockerfile for a build reproducibility test is excessive

https://github.com/JetBrains/intellij-community/blob/master/Dockerfile should be used instead

GitOrigin-RevId: 35235073ecafef8b5eccd2fedf74277bd884b8a9

tools/reproducibleBuilds.diff/Dockerfile

@@ -1,17 +0,0 @@
-FROM ubuntu:20.04
-ENV LANG=C.UTF-8
-ENV SHELL=/bin/bash
-ENV JAVA_HOME=/usr/lib/jvm/java-17-amazon-corretto
-COPY --from=amazoncorretto:17 $JAVA_HOME $JAVA_HOME
-ENV PATH=$JAVA_HOME/bin:$PATH
-RUN apt-get -qq update && apt-get install -y \
-    git \
-    tar \
-    p7zip-full \
-    squashfs-tools  \
-    && rm -rf /var/lib/apt/lists/*
-RUN javap -version && \
-    git --version && \
-    tar --version && \
-    which 7z && \
-    which unsquashfs