Revert "Update AbstractFeatureReader.java"

This reverts commit 4e502bbbbf61d1718416adbf2ec73f9c0edadeed.
Revert "Update TabixFeatureReader.java"

This reverts commit f8e3cd9de635169b7294c20d523965e4e4f47e97.
Revert "Update TabixReader.java"

This reverts commit ca0f7987f0cb5d0e0c8628d4442c4a52b79f2191.
Revert "Update TribbleIndexedFeatureReader.java"

This reverts commit e24c9757bb9d54a7cdc1e19115880f4b6ef5dd92.