how to deinstall JVM from oracle 11g ....
Why would you want to do that?
Anyway, you can't. Oracle DB depends on the JVM. If you remove the JVM the Oracle database will be removed.
See the Database Installation guide
6.8 Removing Oracle Software
The following steps describe how to use Oracle Universal Installer to remove Oracle software from an Oracle home:
Always use Oracle Universal Installer to remove Oracle software. Do not delete any Oracle home directories without first using Oracle Universal Installer to remove the software.
. . .
7.In the Inventory screen, select the Oracle home and the products that you want to remove, then click Remove.
If you choose to remove Oracle JVM, Oracle Universal Installer removes all installed products that depend on Oracle JVM, including Oracle Database 11g.
Oracle Universal Installer displays a confirmation window asking you to confirm that you want to deinstall the products and their dependent components.
our client will not allow JDK 1.5 to run on their cloud; thus our choices are to deinstall the Oracle JVM component, or upgrade the JDK to 1.6_24
Then unfortunately your choice is to deinstall the Oracle database or choose another cloud vendor.
Oracle is expected to announce Oracle 12 at Openworld but Larry Ellison has already said this
Database 12c won't be released until "December, January, February of next year," Ellison said.
And who knows what version of Java will be included.