[lldb] Remove unused escape code defines from status line (llvm#141770)

(cherry picked from commit caaca32)

Author: DavidSpickett

lldb/source/Core/Statusline.cpp

@@ -24,8 +24,6 @@
 #define ANSI_SAVE_CURSOR ESCAPE "7"
 #define ANSI_RESTORE_CURSOR ESCAPE "8"
 #define ANSI_CLEAR_BELOW ESCAPE "[J"
-#define ANSI_CURSOR_DOWN ESCAPE "[B"
-#define ANSI_CLEAR_LINE ESCAPE "[2K"
 #define ANSI_SET_SCROLL_ROWS ESCAPE "[0;%ur"
 #define ANSI_TO_START_OF_ROW ESCAPE "[%u;0f"
 #define ANSI_REVERSE_VIDEO ESCAPE "[7m"