Undo addition to lcov command ignore error

Previously the cpp code coverage was failing due to an error. I added an
ignore error command to lcov but as Johann suggested this may have been a glitch as
later a new error arose saying the ignore errors command did not work it seems
the version of lcov installed changed perhaps as a result of others having similar bugs so
I removed the ignore error command

.github/workflows/testing-and-coverage.yml

@@ -43,7 +43,7 @@ jobs:
 
     - name: Collect C++ coverage
       run: |
-        lcov --output-file coverage.cpp --capture --directory build --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch,gcov
+        lcov --output-file coverage.cpp --capture --directory build
         lcov --output-file coverage.cpp --extract coverage.cpp $PWD/src/"*"
         cat coverage.lcov coverage.cpp > coverage.txt