Fix running a task when 'cwd' is not provided

Removing a check that seems to be a leftover from previous change [2]

[1] eclipse-theia#8930
[2] eclipse-theia#5024 (comment)

Signed-off-by: Alvaro Sanchez-Leon <alvaro.sanchez-leon@ericsson.com>

packages/task/src/node/process/process-task-runner.ts

@@ -116,11 +116,6 @@ export class ProcessTaskRunner implements TaskRunner {
         }
 
         const options = systemSpecificCommand.options;
-        // sanity checks:
-        // - we expect the cwd to be set by the client.
-        if (!options || !options.cwd) {
-            throw new Error("Can't run a task when 'cwd' is not provided by the client");
-        }
 
         // Use task's cwd with spawned process and pass node env object to
         // new process, so e.g. we can re-use the system path