Revert "element: Enforce that elements created by gst_element_factory_create/make() are floating"

See gstreamer/gstreamer!333

The reference we receive when calling g_object_new should be
floating, but we can't force it at our level.

This reverts commit ce43de86.
24 jobs for revert-floating-enforcing in 69 minutes and 8 seconds (queued for 9 minutes and 13 seconds)
Status Job ID Name Coverage
  Preparation
passed #1074413
gst indent

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manifest

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  Build
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build cerbero android universal

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build cerbero cross win32

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build cerbero cross win64

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build cerbero fedora x86_64

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gst-ios-13.2
build cerbero ios universal

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gst-macos-10.15
build cerbero macos x86_64

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build fedora x86_64

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1809 windows docker
build msys2

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build nodebug fedora x86_64

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build static fedora x86_64

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build static nodebug fedora x86_64

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1809 windows docker
build vs2017 amd64

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1809 windows docker
build vs2017 x86

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  Test
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gstreamer
check fedora

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gstreamer
integration testsuites fedora

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passed #1074433
gstreamer
valgrind bad

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gstreamer
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gstreamer
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gstreamer
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gstreamer
valgrind good

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gstreamer
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  Integrate
passed #1074435
android universal examples

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