fix compiler warnings

- fixes error in CI

assembly/src/include/ae108/assembly/utilities/resizeIfPossible.h

@@ -60,8 +60,9 @@ void resizeIfPossible(std::vector<T> *const container,
 }
 
 template <class T, std::size_t Size>
-void resizeIfPossible(std::array<T, Size> *const container,
-                      const typename std::array<T, Size>::size_type size) {
+void resizeIfPossible(std::array<T, Size> *const container [[maybe_unused]],
+                      const typename std::array<T, Size>::size_type size
+                      [[maybe_unused]]) {
   assert(container);
   assert(Size == size);
 }

cpppetsc/test/Matrix_Test.cc

@@ -438,7 +438,7 @@ template <class T> std::string toString(const T &t) {
   std::stringstream stream;
   stream << t;
   return stream.str();
-};
+}
 
 TYPED_TEST(Matrix_Test, writing_to_stream_uses_square_brackets) {
   const auto mat = TestFixture::matrix_type::fromList({

cpppetsc/test/Vector_Test.cc

@@ -344,7 +344,7 @@ template <class T> std::string toString(const T &t) {
   std::stringstream stream;
   stream << t;
   return stream.str();
-};
+}
 
 TYPED_TEST(Vector_Test, writing_to_stream_uses_square_brackets) {
   const auto vec = TestFixture::vector_type::fromList({3., 4.});

solve/test/include/ae108/solve/test/Solver_Test.h

@@ -95,9 +95,6 @@ template <class Policy> struct Assembler_Mock {
 
     const auto replacer = matrix->assemblyView().replace();
     if (displacements.unwrap().size() > 0) {
-      const auto x = displacements(0);
-      const auto y = displacements(1);
-
       replacer(0, 0) = 2.;
       replacer(0, 1) = 0.;
       replacer(1, 0) = 0.;