json1 is now included by defalt, don't include it explicitly

https://www.sqlite.org/json1.html

Author: lovasoa

CONTRIBUTING.md

@@ -52,7 +52,7 @@ Instructions:
 
 ## Compiling SQLite with different options
 
-In order to enable extensions like JSON1 or FTS5, change the CFLAGS in the [Makefile](Makefile) and run `npm run rebuild`:
+In order to enable extensions like FTS5, change the CFLAGS in the [Makefile](Makefile) and run `npm run rebuild`:
 
 ``` diff
 CFLAGS = \
@@ -62,6 +62,5 @@ CFLAGS = \
         -DSQLITE_ENABLE_FTS3 \
         -DSQLITE_ENABLE_FTS3_PARENTHESIS \
 +       -DSQLITE_ENABLE_FTS5 \
-+       -DSQLITE_ENABLE_JSON1 \
         -DSQLITE_THREADSAFE=0
 ```

Makefile

@@ -23,7 +23,6 @@ SQLITE_COMPILATION_FLAGS = \
 	-DSQLITE_DISABLE_LFS \
 	-DSQLITE_ENABLE_FTS3 \
 	-DSQLITE_ENABLE_FTS3_PARENTHESIS \
-	-DSQLITE_ENABLE_JSON1 \
 	-DSQLITE_THREADSAFE=0 \
 	-DSQLITE_ENABLE_NORMALIZE