Fix temporary mill launcher (#699)

Not sure why I had added this. Locally, this makes the scala-cli-based
compile stuff in build try to use the scala-cli script at the root of
the sources, and fail (as it needs the native-image to be built).

Author: alexarchambault

mill

@@ -187,8 +187,6 @@ elif [[ "$cache_dest" == *.zip ]]; then
 fi
 
 eval "$(cs java --env --jvm temurin:17 || cs java --env --jvm openjdk:1.17.0)"
-export PATH=".:$PATH"
-
 
 
 init_mill_jvm_opts