Revert "Fix: Allow target size restriction for LPC55S69"

This reverts commit 4451d64.
We postpone this fix to 5.13.2 due to its breakages for client for this target. It
needs more work.

Author: 0xc0170

targets/targets.json

@@ -2072,8 +2072,7 @@
         "detect_code": ["0236"],
         "device_name": "LPC55S69JBD100",
         "release_versions": ["5"],
-        "program_cycle_s": 10,
-        "sectors": [[0,512]]
+        "program_cycle_s": 10
     },
     "LPC55S69_NS": {
         "inherits": ["NSPE_Target", "LPC55S69"],