refactor (src/frameworks): Delete UBCryptoUtils.{cpp,h}

They provide no public functions and as such can be safely removed.
Also remove them from the build system (qmake and cmake).

Author: Vekhir

src/frameworks/CMakeLists.txt

@@ -7,8 +7,6 @@ target_sources(openboard PRIVATE
     UBBlockingBuffer.h
     UBCoreGraphicsScene.cpp
     UBCoreGraphicsScene.h
-    UBCryptoUtils.cpp
-    UBCryptoUtils.h
     UBFileSystemUtils.cpp
     UBFileSystemUtils.h
     UBGeometryUtils.cpp

src/frameworks/UBCryptoUtils.cpp

@@ -5,7 +5,6 @@ HEADERS      += src/frameworks/UBGeometryUtils.h \
                 src/frameworks/UBStringUtils.h \
                 src/frameworks/UBVersion.h \
                 src/frameworks/UBCoreGraphicsScene.h \
-                src/frameworks/UBCryptoUtils.h \
                 src/frameworks/UBBackgroundLoader.h \
                 src/frameworks/UBBlockingBuffer.h \
                 src/frameworks/UBBase32.h
@@ -16,7 +15,6 @@ SOURCES      += src/frameworks/UBGeometryUtils.cpp \
                 src/frameworks/UBStringUtils.cpp \
                 src/frameworks/UBVersion.cpp \
                 src/frameworks/UBCoreGraphicsScene.cpp \
-                src/frameworks/UBCryptoUtils.cpp \
                 src/frameworks/UBBackgroundLoader.cpp \
                 src/frameworks/UBBlockingBuffer.cpp \
                 src/frameworks/UBBase32.cpp