How to conditionally remove vowels from pandas dataframe columns?

Question

I have a simple dataframe df:

{\'Testingthislongcolumnthatwouldbreakoracle\': {0: 3, 1: 3, 2: 3},
 \'goodcolum\': {0: 1, 1: 1, 2: 1},
 \'goodcolum2\': {0: 2, 1: 2