Commands: remove signalled cases for Windows

Windows does not have the concept of signals, therefore processes may
not terminate with signalling exits.  Such an exit is encoded in the
exit status code on Windows.

Author: compnerd

Sources/Commands/SwiftTestTool.swift

@@ -647,8 +647,10 @@ final class TestRunner {
             switch result.exitStatus {
             case .terminated(code: 0):
                 success = true
+#if !os(Windows)
             case .signalled(let signal):
                 output += "\n" + exitSignalText(code: signal)
+#endif
             default: break
             }
         } catch {
@@ -668,8 +670,10 @@ final class TestRunner {
             switch result.exitStatus {
             case .terminated(code: 0):
                 return true
+#if !os(Windows)
             case .signalled(let signal):
                 print(exitSignalText(code: signal))
+#endif
             default: break
             }
         } catch {