docs: remove trivial documentation

Author: Yubo-Cao

jabgui/src/main/java/org/jabref/gui/util/MarkdownTextFlow.java

@@ -47,7 +47,7 @@ public MarkdownTextFlow(Pane parent) {
      * @param markdownText The Markdown text to render. If null or empty, the TextFlow will be cleared.
      */
     public void setMarkdown(String markdownText) {
-        this.clear();
+        this.clearSelection();
         needsLineBreak = false;
 
         if (markdownText == null || markdownText.trim().isEmpty()) {

jabgui/src/main/java/org/jabref/gui/util/SelectableTextFlow.java

@@ -60,9 +60,6 @@ public SelectableTextFlow(Pane parent) {
         });
     }
 
-    /**
-     * Copy selected text.
-     */
     public void copySelectedText() {
         if (startHit.isEmpty() || endHit.isEmpty()) {
             return;
@@ -79,9 +76,6 @@ public void copySelectedText() {
         }
     }
 
-    /**
-     * Select all text in the TextFlow.
-     */
     public void selectAll() {
         if (getChildren().isEmpty()) {
             return;
@@ -91,10 +85,7 @@ public void selectAll() {
         updateSelectionHighlight();
     }
 
-    /**
-     * Clears selection.
-     */
-    public void clear() {
+    public void clearSelection() {
         getChildren().clear();
         startHit = Optional.empty();
         endHit = Optional.empty();