meteor: Remove corepack installation

Corepack seems to be contained in the Debian package.

Dockerfile.meteor

@@ -13,7 +13,6 @@ RUN apt-get -qq update && \
 RUN cd && \
     wget -q "https://deb.nodesource.com/node_14.x/pool/main/n/nodejs/nodejs_${NODEJS_VERSION}-deb-1nodesource1_amd64.deb" -O nodejs.deb && \
     apt-get -qq install ./nodejs.deb && \
-    npm install -g corepack && \
     corepack enable
 
 RUN cd && \