[theme] remove css colors for cursor

src/vs/editor/browser/viewParts/viewCursors/viewCursors.css

@@ -39,26 +39,6 @@
 	box-sizing: border-box;
 }
 
-.monaco-editor.vs .cursor {
-	background: black;
-	border-color: black;
-	color: white; /* opposite of black */
-}
-.monaco-editor.vs-dark .cursor {
-	background: #AEAFAD;
-	border-color: #AEAFAD;
-	color: #51504f; /* opposite of #AEAFAD */
-}
-.monaco-editor.hc-black .cursor {
-	background: #fff;
-	border-color: #fff;
-	color: #000; /* opposite of #fff */
-}
-.monaco-editor.hc-black .cursors-layer.has-selection .cursor {
-	border-left: 1px solid #000;
-	border-right: 1px solid #000;
-}
-
 @keyframes monaco-cursor-blink {
 	50% {
 		opacity: 0;

src/vs/editor/browser/viewParts/viewCursors/viewCursors.ts

@@ -334,5 +334,9 @@ registerThemingParticipant((theme, collector) => {
 	if (caret) {
 		let oppositeCaret = caret.opposite();
 		collector.addRule(`.monaco-editor.${theme.selector} .cursor { background-color: ${caret}; border-color: ${caret}; color: ${oppositeCaret}; }`);
+		if (theme.type === 'hc') {
+			collector.addRule(`.monaco-editor.${theme.selector} .cursors-layer.has-selection .cursor { border-left: 1px solid ${oppositeCaret}; border-right: 1px solid ${oppositeCaret}; }`);
+		}
 	}
+
 });
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