sagemathgh-38099: Remove deprecated global imports

    
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All deprecated 2019-2022.

### 📝 Checklist

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- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation and checked the documentation
preview.

### ⌛ Dependencies

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URL: sagemath#38099
Reported by: Matthias Köppe
Reviewer(s): Frédéric Chapoton

src/sage/all.py

@@ -104,7 +104,6 @@
 from sage.functions.all  import *
 from sage.calculus.all   import *
 
-lazy_import('sage.tests', 'all', as_='tests', deprecation=27337)
 from sage.cpython.all    import *
 
 from sage.crypto.all     import *
@@ -190,15 +189,6 @@
 copying = license
 copyright = license
 
-def quit_sage(verbose=True):
-    """
-    Does nothing. Code that needs cleanup should register its own
-    handler using the atexit module.
-    """
-    from sage.misc.superseded import deprecation
-    deprecation(8784, 'quit_sage is deprecated and now does nothing; please simply delete it')
-
-
 from sage.misc.persist import register_unpickle_override
 register_unpickle_override('sage.categories.category', 'Sets', Sets)
 register_unpickle_override('sage.categories.category_types', 'HeckeModules', HeckeModules)
@@ -219,11 +209,6 @@ def quit_sage(verbose=True):
 # sys.settrace(poison_currRing)
 
 
-# Deprecated leftover of monkey-patching inspect.isfunction() to support Cython functions.
-lazy_import('sage.misc.sageinspect', 'is_function_or_cython_function',
-            as_='isfunction', namespace=sage.__dict__, deprecation=32479)
-
-
 # Set a new random number seed as the very last thing
 # (so that printing initial_seed() and using that seed
 # in set_random_seed() will result in the same sequence you got at

src/sage/arith/all.py

@@ -24,8 +24,6 @@
                              dedekind_sum,
                              prime_factors, prime_range, valuation)
 
-lazy_import("sage.arith.misc", ("Sigma", "Moebius", "Euler_Phi"), deprecation=30322)
-
 from sage.arith.functions import lcm
 LCM = lcm
 

src/sage/manifolds/all.py

@@ -1,7 +1,5 @@
 from sage.misc.lazy_import import lazy_import
 lazy_import('sage.manifolds.manifold', 'Manifold')
-lazy_import('sage.manifolds.differentiable.examples.real_line', ('OpenInterval', 'RealLine'),
-            deprecation=31881)
 lazy_import('sage.manifolds.differentiable.examples.euclidean', 'EuclideanSpace')
 lazy_import('sage.manifolds', 'catalog', 'manifolds')
 del lazy_import

src/sage/misc/all.py

@@ -12,8 +12,6 @@
                   SAGE_DB,
                    newton_method_sizes, compose,
                   nest)
-lazy_import('sage.misc.misc', 'union',
-            deprecation=32096)
 
 from sage.misc.banner import version
 

src/sage/modular/all.py

@@ -20,13 +20,6 @@
 
 from sage.modular.cusps import Cusp, Cusps
 
-lazy_import('sage.modular.dims', ('dimension_cusp_forms',
-                                  'dimension_new_cusp_forms',
-                                  'dimension_eis',
-                                  'dimension_modular_forms',
-                                  'sturm_bound'),
-            deprecation=(32647, 'removed from main namespace'))
-
 from sage.modular.etaproducts import (EtaGroup, EtaProduct, EtaGroupElement,
                                       AllCusps, CuspFamily)