[libgda] SQLCipher: removed embedded source code

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 07625ecc7c440a8de9c0ba550054084e2b75feef
Author: Daniel Espinosa Ortiz <esodan gmail com>
Date:   Thu Mar 7 14:29:43 2019 -0600

    SQLCipher: removed embedded source code
    
    For now and on SQLCipher provider will be system
    installed version

 providers/sqlcipher/Makefile.am  |      4 -
 providers/sqlcipher/sqlite3.c    | 222955 ------------------------------------
 providers/sqlcipher/sqlite3.h    |  11573 --
 providers/sqlcipher/sqlite3ext.h |    623 -
 4 files changed, 235155 deletions(-)
---
diff --git a/providers/sqlcipher/Makefile.am b/providers/sqlcipher/Makefile.am
index f742de743..c89a32cb4 100644
--- a/providers/sqlcipher/Makefile.am
+++ b/providers/sqlcipher/Makefile.am
@@ -16,10 +16,6 @@ AM_CPPFLAGS = \
        -DSQLITE_HAS_CODEC -DSQLITE_API= -DSQLITE_PRIVATE= -DSQLITE_ENABLE_COLUMN_METADATA 
-DSQLITE_THREADSAFE=1
 
 
-sqlite_sources = sqlite3.c sqlite3.h
-
-libmain.lo: sqlite3.h
-
 libgda_sqlcipher_la_SOURCES = \
        gda-sqlcipher-provider.c \
        sqlcipher.gresources.c \