[birt-dev] Checkin: remove GIF unit tests for charts

["David Michonneau" <dmichonneau@xxxxxxxxxxx>]

- Summary:
remove GIF unit tests for charts

- Bugzilla Bug (s) Resolved:
None

- Description:
GIF output is not supported by charts, remove unit tests for the GIF device renderer.

- Tests Description :
Unit tests

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:

- Notes to Documentation:

- Files Edited:

/org/eclipse/birt/chart/tests/device/render/ImageOutputBaseTest.java

- Files Added:

- Files Deleted

/org/eclipse/birt/chart/tests/device/render/Gif8PrimitiveGen.java

/org/chart/tests/device/golden/*/*.gif