QtBridge: Remove "disable-deprecated-up-to" from config

Remove the flag "-disable-deprecated-up-to 0x070000" which disables all
deprecated function up to Qt 7.0.
We want users to be able to combine qtbridge and cxx-qt in Rust, so both
must use the same Qt version for binary compatibility. If Qt installation
is not present on the system then we will download the minimal Qt from
web.
We also want to support picking specific version of Qt by user:
i.e. "qt_exact_6_10". In this case when the Qt installation is
downloaded from web and built with `disable-deprecated-up-to 0x700000`
it might confusing for user if some functions are missing from API.

Change-Id: I5d00124a1704d4b5a553b7c2d05b3693ff422e74
Reviewed-by: Matthias Rauter <matthias.rauter@qt.io>
Reviewed-by: Simo Fält <simo.falt@qt.io>

coin/platform_configs/quick-bridges.yaml

@@ -13,7 +13,6 @@ Configurations:
         -separate-debug-info
         -optimize-size
         -shared
-        -disable-deprecated-up-to 0x070000
         -no-feature-widgets
         -no-feature-sql
         -no-feature-printsupport
@@ -35,7 +34,6 @@ Configurations:
         -separate-debug-info
         -optimize-size
         -shared
-        -disable-deprecated-up-to 0x070000
         -no-feature-widgets
         -no-feature-sql
         -no-feature-printsupport
@@ -58,7 +56,6 @@ Configurations:
         -force-debug-info
         -optimize-size
         -shared
-        -disable-deprecated-up-to 0x070000
         -no-feature-widgets
         -no-feature-sql
         -no-feature-printsupport