Revert wrong commit "work on INS support for MEGA65 mode"

This reverts commit 2c5e181457.

src/kernal/screen_m65/mega65_screen_helpers_scrlpnt.s

@@ -4,6 +4,10 @@
 
 m65_helper_scrlpnt_color:
 
+	// Set .Z to the current column
+
+	ldz M65__TXTCOL   // XXX probably not the best place for this
+
 	// Setting M65_LPNT_SCR to point to colour memory (starts from $FF80000)
 
 	lda #$0F