Remove the undocumented PRAGMA omit_readlock hack.
FossilOrigin-Name: 96900c47e4fc6ed55cefc10d55d3d8d16bcb1d31
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 6e48b1c..9071bef 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -946,8 +946,7 @@
#define SQLITE_SqlTrace 0x00004000 /* Debug print SQL as it executes */
#define SQLITE_VdbeListing 0x00008000 /* Debug listings of VDBE programs */
#define SQLITE_WriteSchema 0x00010000 /* OK to update SQLITE_MASTER */
-#define SQLITE_NoReadlock 0x00020000 /* Readlocks are omitted when
- ** accessing read-only databases */
+ /* 0x00020000 Unused */
#define SQLITE_IgnoreChecks 0x00040000 /* Do not enforce check constraints */
#define SQLITE_ReadUncommitted 0x0080000 /* For shared-cache mode */
#define SQLITE_LegacyFileFmt 0x00100000 /* Create new databases in format 1 */