Remove tests that we don't want to support
Remove tests that we don't want to support

Removed PromiseGroup test because it relies on unwrapping addition and remove testTimer because it seems to rely on broken semantics (closures) and am not sure what it is supposed to test.

Signed-off-by: Stefan Marr <46f1a0bd5592a2f9244ca321b129902a06b53e03@stefan-marr.de>

smarr/SOMns,VAISHALI-DHANOA/SOMns,smarr/SOMns,smarr/SOMns,richard-roberts/SOMns,smarr/SOMns,richard-roberts/SOMns,richard-roberts/SOMns,MetaConc/SOMns,VAISHALI-DHANOA/SOMns,richard-roberts/SOMns,richard-roberts/SOMns,MetaConc/SOMns,smarr/SOMns,VAISHALI-DHANOA/SOMns,richard-roberts/SOMns,smarr/SOMns,smarr/SOMns,richard-roberts/SOMns,MetaConc/SOMns