databases/tcl-sqlite3: Deprecate port

Replaced with databases/sqlite3 tcl flavor.

PR:		255839
Reported by:	Pavel Volkov <pavelivolkov@gmail.com> (maintainer)

databases/tcl-sqlite3/Makefile

@@ -12,6 +12,9 @@ COMMENT=	SQLite extension for Tcl using the Tcl Extension Architecture (TEA)
 
 LICENSE=	PD
 
+DEPRECATED=	Replaced with database/sqlite3 tcl flavor
+EXPIRATION_DATE=	2021-06-30
+
 LIB_DEPENDS=	libsqlite3.so:databases/sqlite3
 
 USES=		pkgconfig tcl:tea