Do not initialize FASTR_INTERNAL_ARGS if missing.

(cherry picked from commit 92c0894)

Author: fangerer

com.oracle.truffle.r.release/src/R_legacy

@@ -114,10 +114,6 @@ cp="$(IFS=: ; echo "${absolute_cp[*]}")"
 cp="$JAVA_HOME/jre/languages/R/fastr-launcher.jar:$cp"
 
 ## REMOVE FOR NATIVE IMAGE: END
-# internal variable used to pass args to child R processes
-if [ -z "$FASTR_INTERNAL_ARGS" ]; then
-    FASTR_INTERNAL_ARGS=""
-fi
 
 # we can invoke FastR directly, but we do have to set R_HOME
 export R_HOME="$JRE/languages/R"

com.oracle.truffle.r.release/src/Rscript_legacy

@@ -114,10 +114,6 @@ cp="$(IFS=: ; echo "${absolute_cp[*]}")"
 cp="$JAVA_HOME/jre/languages/R/fastr-launcher.jar:$cp"
 
 ## REMOVE FOR NATIVE IMAGE: END
-# internal variable used to pass args to child R processes
-if [ -z "$FASTR_INTERNAL_ARGS" ]; then
-    FASTR_INTERNAL_ARGS=""
-fi
 
 # we can invoke FastR directly, but we do have to set R_HOME
 export R_HOME="$JRE/languages/R"