Revert "Fixed crashing if Migration classes existed but weren't attributed with the Migration attribute. They will be ignored now."
Revert "Fixed crashing if Migration classes existed but weren't attributed with the Migration attribute. They will be ignored now."

This reverts commit c7c8248bfd9e8bcd2641a2aecf36f0090ee20259.

migrating-ravens/RavenMigrations,migrating-ravens/RavenMigrations,migrating-ravens/RavenMigrations