ERC20: Removed OPEN model

[vmwclabot]

@NickSneo, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <john.doe@email.org> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 8b56ab6d75dd07ed083d96985f53893548fa35d8 must be signed by snischal@vmware.com
• Commit 1bd1c81e9a4d5078642394ebdc16e35a5b4fc88b must be signed by snischal@vmware.com

[vmwclabot]

@NickSneo, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <john.doe@email.org> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 67add411012d0a97807ad458bf51f7429df7e904 must be signed by snischal@vmware.com
• Commit 5b20681520a9982f8f7b35eae1cf1f6345a172ff must be signed by snischal@vmware.com