removing unecessary flags

Author: skevy

Dockerfile

@@ -1,8 +1,6 @@
 FROM janeczku/alpine-kubernetes:3.2
 ENV VERSION=v5.3.0 NPM_VERSION=3
 
-ENV CONFIG_FLAGS="--fully-static" DEL_PKGS="libgcc libstdc++" RM_DIRS=/usr/include
-
 RUN apk add --update curl make gcc g++ binutils-gold python linux-headers paxctl libgcc libstdc++ && \
   curl -sSL https://nodejs.org/dist/${VERSION}/node-${VERSION}.tar.gz | tar -xz && \
   cd /node-${VERSION} && \