fix(#170): stop rewriting "-" as "-1*" before compiling

lib/compiling/GScompiler.js

@@ -391,19 +391,6 @@ where compile() was called, in untrusted/run.js.
 					case "}":
 						if (fstring && braces) braces--
 						break
-					case "-":
-						 // Change -a to -1*a so that -a**.5 cases are correctly changed to -(a**.5), not (-a)**.5
-						 // But check for 3e-5 or 3E-5, which should not be modified, and the form a -= x.
-						 // Also 10**-2 should be .01, not 0.2.
-						if (!(singlequote || doublequote || triplequote)) {
-							if ( !(  ((line[i-1] == 'E' || line[i-1] == 'e') && !isNaN(line[i+1])) || 
-									 (line[i-1] == '*' && line[i-2] == '*')    ||
-									  line[i+1] == '=' )  ) {
-								line = line.slice(0,i+1)+'1*'+line.slice(i+1)
-								i += 2
-							}
-						}
-						break
 		    		case "'":
 		    		case '"':
 						if (i > 0 && line[i-1] == 'f') fstring = true