Bug 270092 [CellEditors] [cell editors] TextCellEditor should not specify minimum size
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/TextCellEditor.java
checkDeleteable();
        checkSelectable();
    }
    /**
     * The <code>TextCellEditor</code> implementation of this
     * <code>CellEditor</code> method deletes the
     * current selection or, if there is no selection,
     * the character next character from the current position. 
     */
    public void performDelete() {
        if (text.getSelectionCount() > 0) {
			
            text.insert(""); 
		} else {
            
            int pos = text.getCaretPosition();
            if (pos < text.getCharCount()) {
                text.setSelection(pos, pos + 1);
                text.insert(""); 
            }
        }
        checkSelection();
        checkDeleteable();
        checkSelectable();
    }
    /**
     * The <code>TextCellEditor</code> implementation of this
     * <code>CellEditor</code> method pastes the
     * the clipboard contents over the current selection. 
     */