Remove tailcall test

We no longer rely on tail call optimization happening where musttail is
not supported

Dockerfile

@@ -45,7 +45,7 @@ RUN curl -Ls https://sourceware.org/pub/valgrind/valgrind-3.22.0.tar.bz2 -o valg
 # Recent clang
 RUN wget https://apt.llvm.org/llvm.sh && chmod +x ./llvm.sh && ./llvm.sh 20
 
-RUN apt-get install clang
+RUN apt-get -y install clang llvm
 
 # Set after building valgrind, which doesn't build with clang for some reason
 ENV CC=clang

test_conflict_set.py

@@ -164,12 +164,6 @@ def test_fixup_256():
         cs.check(read(0, bytes([1]), bytes([2])))
 
 
-def test_tailcall():
-    with DebugConflictSet() as cs:
-        cs.addWrites(0, write(bytes([1])))
-        cs.check(*[read(0, bytes([1])) for _ in range(100000)])
-
-
 if __name__ == "__main__":
     # budget "pytest" for ctest integration without pulling in a dependency. You can of course still use pytest in local development.
     import argparse