weather,fuzzyclock: don't set invalid point size

The weather and fuzzyclock applets set both point size and pixel size for the label font, and the point size is set to an invalid value – the documentation is clear that the needs to be greater than zero. This causes an error message to be printed. The comments seem to indicate that this is necessary or the Text.fit fontSizeMode would break, but this seems rather old and in my testing Text.fit seems to work just the same without it.

This change removes this property assignment.