QMake: Compile translations at build time

src/lang/lang.pri

@@ -1,28 +0,0 @@
-TS_FILES += $$files(qbittorrent_*.ts)
-
-# need to use full path, otherwise running
-# `lupdate` will generate *.ts files in project root directory
-for(file, TS_FILES) {
-    TRANSLATIONS += "$${PWD}/$${file}"
-}
-
-isEmpty(QMAKE_LRELEASE) {
-    win32: QMAKE_LRELEASE = $$[QT_INSTALL_BINS]/lrelease.exe
-    else: QMAKE_LRELEASE = $$[QT_INSTALL_BINS]/lrelease
-    unix {
-        equals(QT_MAJOR_VERSION, 5) {
-            !exists($$QMAKE_LRELEASE): QMAKE_LRELEASE = lrelease-qt5
-        }
-    }
-    else {
-        !exists($$QMAKE_LRELEASE): QMAKE_LRELEASE = lrelease
-    }
-}
-
-message("Building translations")
-TS_FILES_NOEXT = $$replace(TS_FILES, ".ts", "")
-for(file, TS_FILES_NOEXT) {
-    message("Processing $${file}")
-    system("$$QMAKE_LRELEASE -silent $${file}.ts -qm $${file}.qm")
-    !exists("$${file}.qm"):error("Building translations failed, cannot continue")
-}