about CacheTypeMetadata

[李玉珏]

Hi：

In the 1.5.0 version, I found that CacheTypeMetadata was abandoned and 
replaced by QueryEntity.

I find that two classes of related instructions exist in the manual:
https://apacheignite.readme.io/docs/sql-queries
https://apacheignite.readme.io/docs/cache-queries

I suggest deleting the instructions and sample code for 
CacheTypeMetadata, so as not to confuse the developer, CacheTypeMetadata 
only exists for the sake of backward compatibility.