Update chemistry test imports (#2264)

This is a minor change to the chemistry library's test imports that
avoids a name resolution error when the QIR Profile is set to something
other than "Unrestricted." The library still does not compile outside of
Unrestricted, but now at least RCA feedback on the library
implementation itself is visible.

Author: swernli

library/chemistry/src/Tests.qs

@@ -6,10 +6,7 @@ import Std.Arrays.Mapped;
 import Std.Arrays.Reversed;
 import Std.Convert.ComplexAsComplexPolar;
 import Std.Convert.IntAsDouble;
-import Std.Diagnostics.CheckAllZero;
-import Std.Diagnostics.CheckZero;
-import Std.Diagnostics.DumpRegister;
-import Std.Diagnostics.Fact;
+import Std.Diagnostics.*;
 import Std.Math.*;
 import Std.StatePreparation.ApproximatelyPreparePureStateCP;