Remove Terminal.options.colors

It wasn't being used

src/Interfaces.ts

@@ -117,7 +117,6 @@ export interface ITerminalOptions {
   bellSound?: string;
   bellStyle?: string;
   cancelEvents?: boolean;
-  colors?: string[];
   cols?: number;
   convertEol?: boolean;
   cursorBlink?: boolean;

src/Terminal.ts

@@ -136,7 +136,6 @@ const vcolors: number[][] = (function(): number[][] {
 })();
 
 const DEFAULT_OPTIONS: ITerminalOptions = {
-  colors: defaultColors,
   convertEol: false,
   termName: 'xterm',
   geometry: [80, 24],
@@ -300,19 +299,6 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
       this[key] = this.options[key];
     });
 
-    if (this.options.colors.length === 8) {
-      this.options.colors = this.options.colors.concat(_colors.slice(8));
-    } else if (this.options.colors.length === 16) {
-      this.options.colors = this.options.colors.concat(_colors.slice(16));
-    } else if (this.options.colors.length === 10) {
-      this.options.colors = this.options.colors.slice(0, -2).concat(
-        _colors.slice(8, -2), this.options.colors.slice(-2));
-    } else if (this.options.colors.length === 18) {
-      this.options.colors = this.options.colors.concat(
-        _colors.slice(16, -2), this.options.colors.slice(-2));
-    }
-    this.colors = this.options.colors;
-
     // this.context = options.context || window;
     // this.document = options.document || document;
     // TODO: WHy not document.body?