build.gradle: Remove redundant wallet_template Gradle task.
build.gradle: Remove redundant wallet_template Gradle task.

natzei/bitcoinj,schildbach/bitcoinj,bitcoinj/bitcoinj,yenliangl/bitcoinj,kmels/bitcoinj,schildbach/bitcoinj,peterdettman/bitcoinj,kmels/bitcoinj,natzei/bitcoinj,bitcoinj/bitcoinj,peterdettman/bitcoinj,yenliangl/bitcoinj