plugin-getter: rm vocal log on checksum entries

When a checksum file for a release is downloaded and iterated upon to
find the compatible binary for a release, we used to log each
non-compatible entry in the logs.

This is noisy as we know there's going to be multiple entries that don't
match the host's os/arch, and there's no good reason to show those, so
we silence them.

packer/plugin-getter/plugins.go

@@ -721,7 +721,6 @@ func (pr *Requirement) InstallLatest(opts InstallOptions) (*Installation, error)
 						continue
 					}
 					if err := entry.validate("v"+version.String(), opts.BinaryInstallationOptions); err != nil {
-						log.Printf("[INFO] ignoring invalid remote binary %s: %s", entry.Filename, err)
 						continue
 					}