remove install files as soon as we're done with them

flutter/install.bash

@@ -18,6 +18,7 @@ set -u
 # Install flutter #
 ###################
 
+common_flutter_home="${HOME}/.local/opt/flutter"
 new_flutter_home="${HOME}/.local/opt/flutter-v${WEBI_VERSION}"
 new_flutter="${HOME}/.local/opt/flutter-v${WEBI_VERSION}/bin/flutter"
 
@@ -53,6 +54,7 @@ pushd "${WEBI_TMP}" 2>&1 >/dev/null
           cp -Hr ./flutter*/* "$new_flutter_home/" 2>/dev/null
           cp -Hr ./flutter*/.* "$new_flutter_home/" 2>/dev/null
         fi
+        rm -rf ./flutter*
 popd 2>&1 >/dev/null
 
 ###################

golang/install.bash

@@ -83,6 +83,7 @@ pushd "$WEBI_TMP" 2>&1 >/dev/null
       cp -Hr ./go*/* "$new_go_home/" 2>/dev/null
       cp -Hr ./go*/.* "$new_go_home/" 2>/dev/null
     fi
+    rm -rf ./go*
 
     # Install x go
     $new_go_home/bin/go get golang.org/x/tools/cmd/goimports > /dev/null 2>/dev/null

node/install.bash

@@ -133,6 +133,7 @@ pushd "$WEBI_TMP" 2>&1 >/dev/null
       cp -Hr ./node*/* "$new_node_home/" 2>/dev/null
       cp -Hr ./node*/.* "$new_node_home/" 2>/dev/null
     fi
+    rm -rf ./node*
 popd 2>&1 >/dev/null
 
 ###################