Delete landscape.yml as not used anymore

.landscape.yml

@@ -1,55 +0,0 @@
-doc-warnings: false
-test-warnings: false
-max-line-length: 79
-inherits:
-    - strictness_veryhigh
-uses:
-    - celery
-autodetect: true
-requirements:
-    - requirements/default.txt
-    - requirements/test.txt
-ignore-paths:
-    - docs
-    - t
-python-targets:
-    - 2
-    - 3
-pep8:
-    full: true
-    disable:
-        - N806
-        - N802
-        - N801
-        - N803
-pyroma:
-    run: true
-pylint:
-    disable:
-        - missing-docstring
-        - too-many-arguments
-        - too-many-locals
-        - redefined-builtin
-        - not-callable
-        - cyclic-import
-        - expression-not-assigned
-        - lost-exception
-        - dangerous-default-value
-        - unused-argument
-        - protected-access
-        - invalid-name
-        - too-many-instance-attributes
-        - bad-builtin
-        - abstract-method
-        - global-statement
-        - too-many-public-methods
-        - no-self-use
-        - unnecessary-lambda
-        - too-few-public-methods
-        - attribute-defined-outside-init
-        - too-many-ancestors
-        - too-many-return-statements
-        - bad-mcs-classmethod-argument
-        - bad-mcs-method-argument
-    options:
-        exclude-protected: _reader, _writer, _popen, _sentinel_poll, _job, _is_alive, _write_to, _scheduled_for, _terminated, _accepted, _set_terminated, _payload, _cancel