RDKEMW-5274:Remove qtvirtualkeyboard libraries from RDK-E build (#690)

Reason for change: Removing the qtvirtualkeyboard support.
Test Procedure:Build size should reduce. Spotify app search should work.
Risks: low
Priority: P2

Change-Id: I10d9952818cd4a8c487050f15a3cde8b08da80d9

Author: vjain008

conf/include/generic-pkgrev.inc

@@ -78,10 +78,6 @@ PV:pn-qtwayland = "5.15.7"
 PR:pn-qtwayland = "r1"
 PACKAGE_ARCH:pn-qtwayland = "${MIDDLEWARE_ARCH}"
 
-PV:pn-qtvirtualkeyboard = "5.15.7"
-PR:pn-qtvirtualkeyboard = "r0"
-PACKAGE_ARCH:pn-qtvirtualkeyboard = "${MIDDLEWARE_ARCH}"
-
 PV:pn-aamp = "2.4.3"
 PR:pn-aamp = "r0"
 PACKAGE_ARCH:pn-aamp = "${MIDDLEWARE_ARCH}"