Always evaluate an expression for JS

People were complaining too much

README.md

@@ -79,7 +79,6 @@ Options are optionally set in `options`, which is a semicolon-delimited list of
 - `java` Java (OpenJDK)
 - `js` JavaScript (Node)
     - `harmony` enables harmony features (`--harmony` on node)
-    - `e` prints the result of evaluating the code
 - `julia` Julia
     - `e` prints the result of evaluating the code
 - `lisp` Racket

docker/javascript/run.sh

@@ -1,11 +1,5 @@
-if [ "$EVAL_EXPR" = "true" ]; then
-    flag="-p"
-else
-    flag="-e"
-fi
-
 if [ "$EVAL_HARMONY" = "true" ]; then
-    node --harmony "$flag" "$1"
+    node --harmony -p "$1"
 else
-    node "$flag" "$1"
+    node -p "$1"
 fi

src/languages/javascript.js

@@ -6,8 +6,7 @@ class JavaScript extends Language {
             name: 'JavaScript',
             aliases: ['javascript', 'js'],
             options: {
-                harmony: () => '',
-                e: () => ''
+                harmony: () => ''
             }
         });
     }
@@ -18,10 +17,6 @@ class JavaScript extends Language {
             ret.env.EVAL_HARMONY = 'true';
         }
 
-        if (options.has('e')) {
-            ret.env.EVAL_EXPR = 'true';
-        }
-
         return ret;
     }
 }